MA Hongying,Lü Xiaoxu,JI Yanan,et al.Leaf Anatomical Structure and Drought Resistance of 17 Caragana Species[J].Research of Soil and Water Conservation,2020,27(01):340-346,352.
17种锦鸡儿属植物叶片解剖结构及抗旱性分析
- Title:
- Leaf Anatomical Structure and Drought Resistance of 17 Caragana Species
- 文章编号:
- 1005-3409(2020)01-0340-07
- Keywords:
- Caragana; leaf; anatomical structure; drought resistance
- 分类号:
- Q944.5
- 文献标志码:
- A
- 摘要:
- 锦鸡儿是西北干旱、半干旱区防风固沙和水土保持的重要植物资源,对生态环境恢复有着重要意义。以17种锦鸡儿属植物叶片作为试验材料,使用石蜡切片法观察叶片解剖结构,测定了叶片厚度、上、下表皮细胞厚度、栅栏组织厚度、海绵组织厚度、主脉厚度、叶片结构紧密度、叶片结构疏松度8项叶片结构指标,利用层次聚类和隶属函数分析了17种锦鸡儿属植物的抗旱能力。结果表明:叶肉解剖结构有3种不同类型,在抗旱性增强的过程中,叶肉结构从普通型、过渡型、环栅型依次过渡,叶片表现为逐渐变厚,栅栏组织、主脉越来越发达,叶片结构紧密度增大; 层次聚类分析聚为2类,第1类主要特征是叶片厚度、栅栏组织厚度、海绵组织厚度、叶片结构紧密度大,叶片结构疏松度小,叶肉结构为环栅型(边塞锦鸡儿过渡型); 第2类主要特征是叶片结构疏松度大,叶片厚度、栅栏组织厚度、叶片结构紧密度、表皮细胞厚度小。根据隶属函数值17种锦鸡儿属植物的抗旱性由大到小排列的顺序为短脚锦鸡儿>荒漠锦鸡儿>多刺锦鸡儿>狭叶锦鸡儿>川西锦鸡儿>粉刺锦鸡儿>边塞锦鸡儿>南口锦鸡儿>红花锦鸡儿>甘蒙锦鸡儿>鬼箭锦鸡儿>柠条锦鸡儿>黄刺条锦鸡儿>刺叶锦鸡儿>灰毛小叶锦鸡儿>中间锦鸡儿>树锦鸡儿。研究结果能为锦鸡儿属植物在干旱半干旱地区植被恢复与重建中的推广应用提供理论依据。
- Abstract:
- Caragana is an important plant resource for windbreak and sand-fixation, and soil and water conservation in the arid and semi-arid regions of northwest China, which is the great significance to restoration of ecological environment. In this study, the leaves of 17 Caragana species were used as experimental materials. The anatomical structure of leaves was observed by paraffin section technique. Eight leaf structure indexes such as leaf thickness, upper and lower epidermal cell thickness, palisade tissue thickness, spongy tissue thickness, main vein thickness, leaf structural tightness, leaf structural looseness were measured. The drought-resistant ability of 17 Caragana species was analyzed by hierarchical cluster analysis and subordinate function values. The results showed that there were three different types of mesophyll anatomical structure, during the process of drought-resistance enhancement, the mesophyll structure transited from ordinary type to transitional type and annular type; the leaf became thicker and thicker gradually; the palisade tissue and main vein became more and more developed, and the leaf structure became more compact; two groups were divided by hierarchical cluster analysis, the first group was characterized by large leaf thickness, palisade tissue thickness, sponge tissue thickness, leaf structure compactness, small leaf structure looseness and ring palisade structure(transitional type of C. bongardiana), the second group was characterized by large leaf structure looseness, leaf thickness and palisade tissue thickness, tight leaf structure and small epidermal cells thickness. According to the subordinate function values, drought-resistance ability of 17 Caragana species decreased in the order: C. brachypoda>C. roborovskyii>C. spinosa>C. acanthophylla>C. erinacea>C. pruinosa >C. bongardiana>C. zahlbruckneri>C. rosea>C. opulens>C. jubata>C. korshinskii> C. frutex>C. acanthophylla>C. microphylla>C. intermedia> C. sibirica. The results of this study can provide the theoretical basis for the popularization and application of Caragana in vegetation restoration and reconstruction in the arid and semi-arid areas.
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备注/Memo
收稿日期:2019-02-25 修回日期:2019-03-21
资助项目:国家自然基金(31560154);宁夏高等学校一流学科建设(草学学科)项目(NXYLXK2017A01);农业部草地资源检测项目(2016)
第一作者:马红英(1993—),女(回族),宁夏固原隆德县人,硕士研究生,主要从事草地生态学研究。E-mail:mahoyi@126.com
通信作者:李小伟(1978—),男,甘肃平凉人,教授,博士,主要从事植物分类与生态学研究。E-mail:Lxwbq@126.com